As far as I can see UTC times are correct in the list, it just doesn't go high enough, according to this site, UTC and GMT are the same thing, which I can't confirm, but seem to think is a bit wrong :) I'm assuming Perlmonks has the UTC+0 time correct

If you live further East of Perth then you are in even more trouble, the Eastern coast of Australia is up to 3 hours ahead of me, (perlmonks)UTC+16

this site shows UTC-5 (Atlanta) as the same time as UTC+0 on Perlmonks, and verifies my +13 number :) this means the UTC times on perlmonks are 5 hours behind, does it not?